Dowel pin extractor tool

ABSTRACT

A pin extractor tool which may use screw fasteners of various sizes. This device includes a shank portion with a slideable sleeve which a chuck portion having a locking sleeve.

m1 3,750,500 [451 Aug. 7, 1973 ABSTRACT United States Patent [1 1Peterson 54] DOWEL PIN EXTRACTOR TOOL 2,941,429 6/1960 Mason Inventor:Alton Peterson 5826 t y Ave. 3,529,497 9/1970Brooks..............................

Cudahy, Wis.

Primary Examiner-James L. Jones, Jr.

[22] Filed: Apr. 29, 1971 Assistant Examiner-Roscoe V. Parker [21] Appl.No.: 138,505

A pin extractor tool which may use screw fasteners of [52] US. 8l/52.35,29/255, 81153.2 [51] Int. B25b 19/00, B25b 13/50 [58] Field ofSearch.....-......... 29/254, 255, 281,

various sizes. This device includes a shank portion with a slideablesleeve which a chuck portion having a locking sleeve.

1 Claim, 11 Drawing Figures Patented Aug. 7, 1973 4m OK qm OI INVENTOR.

14L TON PETERSON DOWEL PIN EXTRACTOR TOOL This invention relates to handtools, and more particularly to a dowel pin extractor tool.

It is therefore the principal purpose of this invention to provide adowel pin extractor tool which will have the advantage over the tools ofthe prior art, in that it may use screws of various sizes.

Another object of this invention is to provide an extractor tool whichwill not require the use of a multiple number of adaptors that so oftenbreak.

A furtherobject of this invention is to provide an extractor tool of thetype described which if a screw should break all the user has to do isreplace it with another screw.

Other objects of the present invention are to provide a dowel pinextractor tool which is simple in design, inexpensive to manufacture,rugged in construction, easy to use and efficient in operation.

These and other objects will be readily evident upon a study of thefollowing specification and the accompanying drawing wherein:

FIG. 1 is a horizontal view of the present invention shown in elevationand partly broken away;

FIGSQZA, 3A, 4A, 5A, and 6A are horizontal views of sleeves for fittingvarious screws; and

FIGS. 28, 3B, 4B, 5B, and6B are horizontal views of socket-head capscrews.

According to this invention, a dowel pin extractor tool 10 is shown toinclude a bar portion 11 which is threaded into a knurled sleeve 12, theopposite end of bar 11 receiving a bar 13 having a knurled handle 14.

Slideable upon the connected bars 11 and 13 is a knurled sleeve 15 whichserves as knocker means for tool 10.

A knurled sleeve 15 is threadingly attached to sleeve 12 and insertivelyreceives a cap screw 16 so that its head 17 abuts with shoulder 18 onthe interior of sleeve 15, the sleeve 15 serving to hold cap screw 16tightly within the chuck portion of tool 10, the chuck portioncomprising sleeve 12 interlocking sleeve 15.

It is to be noted that the threaded end of cap screw 16 is adaptable forengagement with a threaded opening in an end of a dowel pin.

The plurality of different size sleeves 19 are for fitting thevarious'screws 16. These different sizes of sleeves are shown in FIGS.2a through 6a',-, and the screws are shown in FIGS. 2b through 6b; itbeing noted that the outer diameter of the sleeve head is constant inall of the figures so to be receivable within the same knurled sleeve15, while the opening within the head of sleeves 19 is varied so toaccomodate the different sizes of screw heads 17, it being further notedthat the different sizes of screws are adaptable for pulling differentsizes of dowel pins. I

It will be noted that the sleeves l2 and 15 are of such structure so asto accommodate various sized cap screw fasteners 16.

What I claim is:

1. A dowel pin extractor tool comprising interconnected and fitted barmembers, a sleeve carried by said bar members serving as a knocker forsaid tool, a knurled handle carried by said tool for gripping it in thehands of a user, a pair of threaded and interconnected sleeves carriedby said tool forming chuck means for securely holding screw fasteners ofvarious sizes, one of said bars being externally threaded at one end forbeing received within one end of said knurled sleeves forming a chuck ofsaid tool, an opposite end of said bar being entirely threaded forthreadingly receiving said other bar having said knurled handle, saidother bar being of a same diameter as said first bar in order that saidknocker may freely slide. thereon, one end of said sleeve forming saidchuck being externally threaded and receiving a knurled locking sleeve,a shoulder formed within the bore of said locking sleeve abutting withthe head of a cap screw received within said locking sleeve, saidlocking sleeve selectively receiving one of a plurality of differentsize screw adaptors, each of said sleeve adaptors comprising an enlargedhead at one end of a shank, and being of a same outside diameter whilean opening through each is varied to accommodate cap screws of differentsizes.

# I t i I

1. A dowel pin extractor tool comprising interconnected and fitted barmembers, a sleeve carried by said bar members serving as a knocker forsaid tool, a knurled handle carried by said tool for gripping it in thehands of a user, a pair of threaded and interconnected sleeves carriedby said tool forming chuck means for securely holding screw fasteners ofvarious sizes, one of said bars being externally threaded at one end forbeing received within one end of said knurled sleeves forming a chuck ofsaid tool, an opposite end of said bar being entirelY threaded forthreadingly receiving said other bar having said knurled handle, saidother bar being of a same diameter as said first bar in order that saidknocker may freely slide thereon, one end of said sleeve forming saidchuck being externally threaded and receiving a knurled locking sleeve,a shoulder formed within the bore of said locking sleeve abutting withthe head of a cap screw received within said locking sleeve, saidlocking sleeve selectively receiving one of a plurality of differentsize screw adaptors, each of said sleeve adaptors comprising an enlargedhead at one end of a shank, and being of a same outside diameter whilean opening through each is varied to accommodate cap screws of differentsizes.